Another clear night and I set up three cameras. Two to record firefly trails, and the other to record the nighttime sky for star trails. I still need to do some testing, but it seems that the Nikon sensors do a better job with low light images (less sensor noise). And among the Nikon sensors, the D810a camera does better with exposures over 30 seconds. In addition to the star trails, I also did a time-lapse video of the night sky.